Ophthalmic mounting



H. H. STYLL.

OPHTHALMIC MOUNTING.

APPLICATION FILED Nov. I911.

Patented Feb;17,1920;-

Ha I

INVENTOR H. H. STYLL K M-el aw-av HARRY H.'STYLL,-0F SOUTHBRIDGE, MASSACHUSETTS.

OPHTHALMIC MOUNTING.

Specification of Letters Patent.

Patented Feb. 17, 1920.

Application filed November 7, 1917. Serial No. 200,730.

To all whom it may-concern.-

Be' it known that I. HARRY H. S'rYLL. of Southbridge, in the county of Worcester and State of Massachusetts, haveinvented certain new and useful Improvements in Ophthalmic Mountings, of which the following is a specification.

Thisinvention relates to improvements in ophthalmic mountings, and has particular reference to an improved mounting of the finger-piece type" which is retained on the face by'spring actuated levers pivoted to a suitable lens connecting member or support.

The leading object of the present invention is the provision of an improved mounting of this character in which friction between the several moving parts of the mounting shall be reduced to a minimum.

A further object of the invention is the provision of a frictionless mounting of this character in which the lever shall be securely held against any wabbling or tilting movement as respects the bridge or support and in which the lever shall at the same time be relievedof any binding action of the spring thereagainst during the swinging of the lever in a direction to Wind up or tense the spring.

Other objects and advantages of my improved construction should be readily understood by reference to the following specification taken in connection with the accompanying drawings, and it will be understood that I may make any modifications in the specific details of construction shown and described within the scope of the appended claims without departing from or exceeding the spirit of my invention.

Figure I represents a front elevation of a mounting embodying my improvements, and

Fig. II represents a vertical sectional view therethrough.

111 the drawings, the numeral 1 designates the bridge or lens connecting member provided adjacent the lenses with the seats 2 on which swing the guard levers 8 for retaining the mounting in position on the face. Suitable clips 4: serve to engage thelenses 5 to retain them in proper position before the eyes when the mounting is on the face.

In the form of my invention particularly illustrated in connection with Fig. II I have shown as secured in and projecting above the bridge the tube or sleeve 6 which provides a pivot for the lever 3, the lever having formed integral therewith or suitably secured thereto the tube 7 which has a sliding fit with the sleeve 6 so that the lever has an elongated bearing tending to prevent any undue wear or play between the lever and-its pivot even though the parts due to inaccuracies in the forming tools or the like donot fit each'other with the intended closeness;

It is" to be noted that to retain the lever and itstube in position on the pivot sleeve there is engaged in the sleeve the screw or like fastening device 8, the screw having a head 9 of size to overlie and extend outwardly beyond the tube on the lever, the height of the sleeve being slightly greater than that of the tube and lever so that there will be no binding of the head of the screw on the tube when it is tightened on the upper end of the sleeve.

For actuation of the guard lever just described and to cause it to properly swing toward the nose of the wearer of the mounting I preferably employ a coil spring arranged axial with the pivot for the lever and surrounding said pivot. In the drawings I have shown this placed around the tube on the lever previously referred to, but in place of having the spring directly surrounding the tube which is an oscillating part of the mounting and to eliminate any possible retarding friction on account of the tightening of one of the coils .of the spring around said moving part and thus impairing the efficiency of the mounting I have inserted between the spring and the tube 7 a loose tubular washer or sleeve 10 which has a sliding fit around the tube on the lever so that the tube will move freely within the washer should there be any binding of the spring against the latter, while the spring and washer may turn independent of the movement of the lever and its tube in the event that tightening of the coils of the spring on the washer should tend to make the washer move at a different rate of speed than the rate at which the lever itself is moving or should the spring have a slightly jerky or uneven action.

It will thus be seen that the presence of my improved floating washer member 10 with the spring 11 surrounding it and held spaced from the remaining parts of the mounting by the floating washer serves to eliminate all possibility of friction between the spring and other parts, while the extension of the lever fits around the pivot sleeve and provides a bearing for the lever preventing weaving or wabbling of the lever andat the same time allowing for a slight free play between the parts and eliminating the necessity for an extremely close fit between the parts to prevent such movement as is necessary with mountings not having such an extension.

It will be further noted that I have shown the lower end of the screw 8 spun.over as at 12 to prevent any loosening of the fastening device while it is further to be noted that on account of the fit of the washer outside the tube on the lever it forms a second or safety bearing which will contact with the head of the screw at one end and with the lever at the other in the event that sleeve or through breakage or the like of the tube it should fail to properly function so that it may thus serve the double purpose of an anti-friction member and of a spacing member and guide to prevent wabbling. V I claim 1. The combination with a support, of a pivot carried thereby, a lever having a tubular portion embracing the pivot, a tubular washer encircling the said portion of the lever, and an actuating spring for the lever surrounding the washer.

2. In a device of the character described, the combination with a pivoted lever and an actuating spring therefor, of a floating washer interposed between a movingpart on the lever and the spring.

3. In a device of the character described, the combination with a pivoted lever having a tubular projection, of a floating member surrounding the projection, and an actuating spring for the lever encircling the floating member. I V

In testimony whereof I have affixed my signature, in presence of two witnesses.

v HARRYH. STYLL. Witnesses i E. S. KooHERsPEnoER, H. K. PARSONS. 

